Pueblo I Period

Ancestral Puebloan periods
Archaic–Early Basketmaker Era 7000–1500 BCE
Early Basketmaker II Era 1500 BCE–50 CE
Late Basketmaker II Era 50–500
Basketmaker III Era 500–750
Pueblo I Period 750–900
Pueblo II Period 900–1150
Pueblo III Period 1150–1350
Pueblo IV Period 1350–1600
Pueblo V Period 1600–present

The Pueblo I Period (750 to 900) was the first period in which Ancestral Puebloans began living in pueblo structures and realized an evolution in architecture, artistic expression, and water conservation.

Pueblo I, a Pecos Classification, is similar to the early "Developmental Pueblo Period" of 750 to 1100. It is preceded by the Basketmaker III Period, and is followed by the Pueblo II Period.